Spark plugs are due at 168k KM. Use the OEM specified NGK spark plugs only (part number found in MA section of the FSM).
Engine coolant, transmission fluid, transfer case, differentials, power steering fluid, brake fluid, serpentine belt, grease the front driveshaft, fuel filter, cabin air filter, engine air filter... basically everything is "on the menu" if it hasn't been done before.
Fluid recommendations:
- Engine coolant: OEM green concentrate
ATF: Castrol Transmax Import, Nissan Matic D
Transfer case: any synthetic ATF claiming to meet Dexron III specifications
PSF: same as transfer case
Brake fluid: any DOT3 fluid
Serpentine belt: OEM
Grease: any meeting NLGI No. 2 lithium soap base, preferably synthetic
Fuel filter: Wix/NAPA Gold
Cabin air filter: Wix/NAPA Gold
Engine air filter: Wix/NAPA Gold, OEM, FRAM
See the general information thread for information on changing most of these fluids yourself.